This is a required field for the BGM category as I fill out the event information. But I am not hosting games that are part of a game system, just standalone boards that are not part of any series or franchise.

For now I just put the game's name in there again, I think I can change it later. Is that ok? What should I be doing with this field?

As a side note: do not repeat information across multiple fields unless absolutely necessary. That means you should never have the game name/system in the description and it's often a good idea to have a title that is more than just the game name, as well.